C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 5/15 (2006.01) C08K 5/103 (2006.01) C08K 5/1535 (2006.01)
Patent
CA 2365508
A thermoplastic polycarbonate composition suitable for the preparation of optical storage devices, for instance optical discs, is disclosed. The composition, containing a stabilizing amount of partially fatty acid ester and as a stabilizer, a compound the structure of which contains at least one benzofuran-2-one group per molecule, features improved resistance to yellowing, reduced haze and high total light transmission values.
L'invention concerne une composition de polycarbonate thermoplastique convenant à la préparation de dispositifs de stockage optique, tels que disques optiques. La composition, qui contient une quantité stabilisante d'ester d'acide partiellement gras et, comme stabilisant, un composé dont la structure contient au moins un groupe de benzofuranne-2-one par molécule, présente une meilleure résistance au jaunissement, un trouble réduit et des valeurs élevées de transmission de la lumière totale.
Gerace Michael A.
Johnson James B.
Krishnan Sivaram
Tennant Jeff M.
Corporation Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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